01 December 2011

Zooniverse, by Scientific American, is home to the internet's largest and most popular citizen science projects, addressing research in the fields of space, climate, history. Among other, you can help researchers categorizing the calls of killer whales and pilot whales directly on the website.

The increasing number of acoustic recordings and the large call repertoire make it very difficult for scientists to go through the data. A single person would take months, and the outcome would still depend on a single persons’ interpretation.

So, everybody can help to classify the sounds that whales make, into distinct groupings. For example, in orcas there are over 150 identified types of call. Every time you match a pair of orca calls, you're casting a vote for those two calls to be considered 'similar'. With many people listening to each sound and casting a vote, researchers can build up a map of those calls that are more or less alike, to find patterns and groupings. Learning how whales communicate with each other will help addressing questions as: how well do different judgements agree, how well is it possible to categorize those calls, how large is the call repertoire of pilot whales, is size repertoire sign of intelligence, does this repertoire change during sonar transmissions? M.J.